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VOLUME 17 , ISSUE 1 ( January, 2016 ) > List of Articles

RESEARCH ARTICLE

Stress Distribution Evaluation of the Periodontal Ligament in the Maxillary Canine for Retraction by Different Alveolar Corticotomy Techniques: A Three-dimensional Finite Element Analysis

Ariel Adriano Reyes Pacheco, Armando Yukio Saga, Key Fonseca de Lima, Victor Nissen Paese

Citation Information : Pacheco AA, Saga AY, de Lima KF, Paese VN. Stress Distribution Evaluation of the Periodontal Ligament in the Maxillary Canine for Retraction by Different Alveolar Corticotomy Techniques: A Three-dimensional Finite Element Analysis. J Contemp Dent Pract 2016; 17 (1):32-37.

DOI: 10.5005/jp-journals-10024-1799

Published Online: 00-01-2016

Copyright Statement:  Copyright © 2016; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

By using the finite element method (FEM), this study aimed to evaluate the effect of different corticotomy formats on the distribution and magnitude of stress on the periodontal ligament (PDL) during retraction of the maxillary canine.

Materials and methods

A geometric model of the left hemi-jaw was created from computed tomography scan images of a dry human skull and loads were administered during distalization movement of the canine. Three trials were performed: (1) without corticotomy, (2) box-shaped corticotomy and perforations in the cortical bone of the canine (CVC) and (3) CVC and circularshaped corticotomy in the cortical bone of the edentulous space of the first premolar.

Results

There was no difference in stress distribution among the different corticotomy formats.

Conclusion

Different corticotomy formats used to accelerate orthodontic tooth movement did not affect stress distribution in the PDL during canine retraction.

Clinical significance

From a mechanical perspective, the present study showed that the stress distribution on the PDL during canine retraction was similar in all the corticotomy formats. When using the Andrews T2 bracket, the PDL presented the highest levels of stress in the middle third of the PDL, suggesting that the force was near the center of resistance. Also, as bone weakening by corticotomies did not influence stress distribution, the surgical procedure could be simplified to a less aggressive one, focusing more on inflammatory cellular stimulation than on bone resistance. A simpler surgical act could also be performed by most orthodontists in their practices, enhancing postoperative response and reducing patient costs.

How to cite this article

Pacheco AAR, Saga AY, de Lima KF, Paese VN, Tanaka OM. Stress Distribution Evaluation of the Periodontal Ligament in the Maxillary Canine for Retraction by Different Alveolar Corticotomy Techniques: A Threedimensional Finite Element Analysis. J Contemp Dent Pract 2016;17(1):32-37.


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